Two-Phase Multiphase Buck PWM Controller with Integrated MOSFET Drivers

The ISL6315 two-phase PWM control IC provides a precision voltage regulation system for advanced loads up to 60A to 80A. Multiphase power conversion is a marked departure from single phase converter configurations employed to satisfy the increasing current demands of modern microprocessors and other electronic circuits. By distributing the power and load current, implementation of multiphase converters utilize smaller and lower cost transistors with fewer input and output capacitors. These reductions accrue from the higher effective conversion frequency with higher frequency ripple current due to the phase interleaving process of this topology.

Features

• Integrated Two-Phase Power Conversion

• 5V to 12V Input Voltage Conversion

• Precision Channel Current Sharing

- Loss-Less Current Sampling - Uses rDS(ON)

• Precision Output Voltage Regulation

- ±1 System Accuracy Over-Temperature (Commercial)

• Microprocessor Voltage Identification Inputs

- Up to a 6-Bit DAC

- Selectable between Intel’s VRM9, VRM10, or AMD’s Hammer DAC codes

• Fast Transient Recovery Time

• Overcurrent Protection

• Pre-Biased Output Start-up Operation

• Sources and Sinks Output Current

- Bus Termination Applications

• Improved, Multi-tiered Overvoltage Protection

• QFN Package:

- Compliant to JEDEC PUB95 MO-220

QFN - Quad Flat No Leads - Package Outline

- Near Chip Scale Package footprint, which improves

PCB efficiency and has a thinner profile

• Pb-Free Plus Anneal Available (RoHS Compliant)